Re: CStatusBar

From:

"Tom Serface" <tom.nospam@camaswood.com>

Newsgroups:

microsoft.public.vc.language,microsoft.public.vc.mfc

Date:

Fri, 7 Dec 2007 09:54:27 -0800

Message-ID:

<#0i1HpPOIHA.4948@TK2MSFTNGP02.phx.gbl>

That sort of thing happens all the time and we get questions here almost
weekly where people try to update controls directly from threads or other
windows. PostMessage() is almost always a better way to do it, but it's not
so obvious as just grabbing a pointer and calling a function.

Tom

"jc" <k.jayachandran@gmail.com> wrote in message
news:c6fe6e54-c222-471f-9fa2-9079ae2422c7@p69g2000hsa.googlegroups.com...

Ulrich,

my worker thread is basically a timer thread, with a wait time of 1000
millisec, and it is not part of my data acquisition thread, the
program works in all lab pcs in the release mode too. so i guess that
solves my problem.
i learned a very valuable lesson. don't mess stuffs in the gui thread
with a worker thread.
if you want to do stuffs with the gui, then just post a message and
let windows take care of it.

thanks
jc
On Dec 6, 11:27 am, "Tom Serface" <tom.nos...@camaswood.com> wrote:

Glad that worked for you...

Tom

"jc" <k.jayachand...@gmail.com> wrote in message

news:8c441ffc-cb72-43b4-aee6-407c9c0543a5@w34g2000hsg.googlegroups.com...

thanks your suggestion solved the problem i think
i created a message function which will called the UpdateStatusBar
function and my worker thread did a PostMessage from that function.

now the debug mode doesn't crash. i have to create a release output
and move to a lab pc and test my code over there

thanks everybody for your help

jc
On Dec 6, 12:24 am, "Tom Serface" <tom.nos...@camaswood.com> wrote:

Are you attempting to update the status bar in the main GUI thread
from
a
worker thread? If so, I'd do it by sending a message to the GUI
thread
(most likely handled in the mainframe) telling it to update the status
bar.
You get into all kinds of trouble when you try to call GUI code in the
main
thread from "other threads".

I would use PostMessage() from the worker thread to send messages to
update
the status bar.

Tom